In the morning, drive from Delhi to Keys Prima Resort, Ramgarh which is 25kms. from Nainital. Arrive in Nanital and spend the day at leisure.
Spend the day visiting places of interest in Nainital. Possible sights you could visit include the Naina Devi temple, Lands End, Mall Road, Tiffin Top and the Zoo. One can also take the ropeway (on direct payment basis). You might like to go boating on Naini Lake in the evening (on direct payment basis).
Today take an excursion to other sights around Nainital. You will visit the lakes of Sattal, Bhimtal and Naukuchiatal. The evening is at leisure.Drive back from Nainital to Delhi.